The book store has employed an error checking algorithm to its inventory system. In this system, the first two characters are always capitals letters. The next three characters are always numbers. The three numbers are added together and concatenated to the end of the new error correcting book number following a period as shown. Demonstrate the use of string functions by writing a program to create error the encoded book inventory numbers. Allow for multiple entries such as the sample PL258 as shown. Use Visual Basics.

Example: PUZ58 becomes the error encoded book number PL258 Always 2 letters Always3 numbers 2+5+8 15